Easy Sudoku Seven Logic Puzzles (Vol 1) 
 Chapter 16: Fourteen Easy (DiffLev 4) Sudoku-7D Puzzles (numbers 177-190) 
 
-  Step-by-step instructions for solving  Puzzle 177, (23/49)   Diff: 4/9441
 -  Step-by-step instructions for solving  Puzzle 178, (26/49)   Diff: 4/9953
 -  Step-by-step instructions for solving  Puzzle 179, (27/49)   Diff: 4/9653
 -  Step-by-step instructions for solving  Puzzle 180, (28/49)   Diff: 4/9962
 -  Step-by-step instructions for solving  Puzzle 181, (30/49)   Diff: 4/9962
 -  Step-by-step instructions for solving  Puzzle 182, (30/49)   Diff: 4/9882
 -  Step-by-step instructions for solving  Puzzle 183, (30/49)   Diff: 4/8985
 -  Step-by-step instructions for solving  Puzzle 184, (31/49)   Diff: 4/9982
 -  Step-by-step instructions for solving  Puzzle 185, (31/49)   Diff: 4/9743
 -  Step-by-step instructions for solving  Puzzle 186, (32/49)   Diff: 4/9992
 -  Step-by-step instructions for solving  Puzzle 187, (32/49)   Diff: 4/9991
 -  Step-by-step instructions for solving  Puzzle 188, (32/49)   Diff: 4/9892
 -  Step-by-step instructions for solving  Puzzle 189, (33/49)   Diff: 4/9995
 -  Step-by-step instructions for solving  Puzzle 190, (35/49)   Diff: 4/9993